Robuta

https://marinespecies.org/aphia.php?p=taxdetails&id=111

WoRMS - World Register of Marine Species - Fissurellidae J. Fleming, 1822

marine species worms world register fissurellidae

https://species.wikimedia.org/wiki/Hemitoma_(Fissurellidae)

Hemitoma (Fissurellidae) - Wikispecies

hemitoma fissurellidae wikispecies